Watching Over You!

Thanks for all your help with these strange contraptions. I went for a closer look today, I'm still not sure what they are. I was a bit sorry that I couldn't get up on the ledge to get a closer look at the cylindrical bit with the two openings in, but it was just too high. I've put some more angles on the odd structures and the hut next door on my Flickr if anyone wants a look.